Loss of smell is connected with zinc deficiency. Mercury poisoning causes mineral disruption. Search the forum for a list of all the supplements to take. I suggest that you do a one month parasite cleanse. Search the forum for information about that.

What are your other symptoms? Are you anemic? Do you have sensitivity to perfumes, diesel fumes, etc. Are you very fatigued? Do you have muscle ache? Is your body temperature below normal? Have you been gaining weight?